The average American gamer is 33 years old and likes to play video games on their smartphone. And the average gamer is spending on games more each year, 20 percent more than one year ago and 85 percent more than in 2015. That information comes from a report by the Entertainment Software Association, or ESA, a group that represents computer software and gaming companies. Ipsos, a market research company, questioned about 4,000 gamers for the ESA report. In the United States, more than 164 million people play video games. That represents nearly 65 percent of all U.S. adults. The most popular kind of game is the casual game, activities that have simple rules and do not require much time or skill.